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Spanning-tree VLAN question

Posted on 2014-02-04
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Last Modified: 2014-03-26
I currently have an etherchannel configured. I have one of the interfaces that traffic is gettign sent through, but the other is showing in a independent/suspended state and will not join the bundle.

When I issue a sh spanning-tree vlan 5 on the switch I get the output below.

Interface Gi1/0/24 belongs in port-channel10, why would it be showing the individual interface in this location. How do I remove it?




VLAN0005
  Spanning tree enabled protocol ieee
  Root ID    Priority    
             Address    
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority      ()
             Address    
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  300 sec

Interface           Role Sts Cost      Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Po10                Desg FWD 4         128.744  P2p
Gi1/0/24            Desg FWD 4         128.24   P2p
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Question by:Yeloball
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by:Infamus
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what is the port channel number that is in question?

Can you post sh etherchannel summary and sh run int gi1/0/24?
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by:harbor235
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All it is saying is that vlan 5 is defined on the port channel and on port Gi1/0/24. You must have port Gi1/0/24  set as an access port with vlan 5 assigned. That is not a problem unless you want port Gi1/0/24  in another vlan?

I assume the port channel uses vlan 5 as well?, the port channel is either trunking several vlans or is not a trunk port and  vlan 5 is defined on the port members of the port channel?

Can you post sh run int Gi1/0/24 and show run int Po10?

harbor235 ;?
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Author Comment

by:Yeloball
Comment Utility
sh run int gi1/0/24
Building configuration...

Current configuration :
!
interface GigabitEthernet1/0/24
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport trunk allowed vlan 5,15
 switchport mode trunk
 channel-group 10 mode active

sh run int po10
Building configuration...

Current configuration :
!
interface Port-channel10
 switchport access vlan 5
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport trunk allowed vlan 5,15
 switchport mode trunk
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Author Comment

by:Yeloball
Comment Utility
Infamus,

Here is the line from the sh ether summary.

 Po10(SU)        LACP      Gi1/0/23(P) Gi1/0/24(I)

The (I) means it is in stand-alone. this is the interface that will not bundle into the port-channel.
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by:Soulja
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Post the other member interface config also. Make sure the configuration on the Port channel and member interfaces match EXACTLY. except for the channel-group command.
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by:Soulja
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Also, what is the configuration of the port connecting to Gi1/0/24, that is pretty important too. Post the config of that interface also.
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by:harbor235
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What kind of device is this? So not sure I understand the problem? There is another port that is defined as a Po10 member but is not joining the bundle?  Post the following output from the command

show etherchannel 10 detail


harbor235 ;}
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Expert Comment

by:Infamus
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Good point Soulja!
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Author Comment

by:Yeloball
Comment Utility
Here is the other member interface configuration.

sh run int gi1/0/23
Building configuration...

Current configuration : 249 bytes
!
interface GigabitEthernet1/0/23
 switchport access vlan 5
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport trunk allowed vlan 5,15
 switchport mode trunk
 channel-group 10 mode active
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by:harbor235
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I would verify the other side, specifically verify the other end that connects to GigabitEthernet1/0/24 and compare that agains the other side that connects to GigabitEthernet1/0/23.


harbor235 ;}
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by:harbor235
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Whatever connects to GigabitEthernet1/0/23 is having a problem, it may be that it is configured differently than the other side that is working.


harbor235 ;}
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Expert Comment

by:harbor235
Comment Utility
I bet the port on the other end that connects to GigabitEthernet1/0/23 is not in an etherchannel group like the other end that connects to GigabitEthernet1/0/24.

harbor235 ;}
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Expert Comment

by:Infamus
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It's Gi1/0/24 which is having an issue.

Yes, please check the other end's config.
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Author Comment

by:Yeloball
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The other end is connecting to A HP backup node. That NIC configuration is pretty straight forward, select High Availability (bonded) and be no your way.
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Author Comment

by:Yeloball
Comment Utility
That node does support 802.3AD which is what the high availability is.
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Expert Comment

by:harbor235
Comment Utility
Aah yes, got the interface numbers crossed so:

I bet the port on the other end that connects to GigabitEthernet1/0/24 is not in an etherchannel group like the other end that connects to GigabitEthernet1/0/23.


harbor235 ;}
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Expert Comment

by:Soulja
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I also notice your Gi24 interface and gi23 interface configs don't match. The 23 match the port channnel but 24 doesn't compleltly.
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by:Infamus
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High availability?  So it is active/passive mode?
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by:Soulja
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!
interface Port-channel10
 switchport access vlan 5
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport trunk allowed vlan 5,15
 switchport mode trunk

Interface GigabitEthernet1/0/23
switchport access vlan 5
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport trunk allowed vlan 5,15
 switchport mode trunk
 channel-group 10 mode active

interface GigabitEthernet1/0/24
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport trunk allowed vlan 5,15
 switchport mode trunk
 channel-group 10 mode active
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Author Comment

by:Yeloball
Comment Utility
What would be ideal. Should I add switchport access vlan5 to gi1/0/24 or remove that from port-channel config and gi1/0/23?
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Author Comment

by:Yeloball
Comment Utility
Infamus, that is correct.
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Expert Comment

by:harbor235
Comment Utility
Are you saying that the other end of the channel is not going to the same device? Are you trying to do VPC from a Cisco Box to an HP box?

Please describe your setup in detail, nodes involved, vendors, etc ......


harbor235 ;}
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Expert Comment

by:Soulja
Comment Utility
I would remove the command as it is not needed.
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Accepted Solution

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Yeloball earned 0 total points
Comment Utility
Found that one of the bonded interfaces on the NIC was malfunctioning. Had to replace the NIC to resolve the issue.
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Author Closing Comment

by:Yeloball
Comment Utility
Had to replace hardware.
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